Viscosity, temperature & boiling point elevation
Use a property envelope that follows the liquid from feed to final concentrate.
Prepare a property table, not one number
For each relevant concentration record temperature, viscosity, density and the method used. Include the normal and most difficult anticipated batches. Where behaviour depends on shear, preserve that context rather than treating the value as a universal constant.
Separate pressure from product temperature
Absolute pressure determines pure-water saturation behaviour, but dissolved material can raise the product boiling temperature. This boiling point elevation reduces the available temperature difference for heat transfer and matters to effect allocation and compressor lift.
Connect properties to equipment choices
Outlet viscosity affects the film, transfer pump and discharge pressure loss. Density is needed when converting volume flow to mass flow. Surface behaviour and foaming affect distribution and separation. These are coupled design inputs rather than independent catalogue checkboxes.
Ask for a limit with a reason
A proposed maximum concentration should be accompanied by the limiting condition: quality, viscosity, heat transfer, deposition or utilities. A test result is most useful when it explains the limiting mechanism and the conditions under which it was obtained.
Related equipment
Vertical tube bundle
Transfer heat through a continuously wetted surface.
DOWNSTREAM / TRANSFERConcentrate transfer package
Move the outlet product without destabilising the separator.
HEAT RECOVERY / MVRMechanical vapour recompressor
Raise recovered vapour pressure using electrical drive.